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Fluorescent carbon quantum dots with scale inhibition performance as well as preparation method and application thereof

A technology of carbon quantum dots and fluorescence, which is applied in the field of industrial water treatment chemicals, can solve the problems of single scale inhibition performance, narrow application range, and use restrictions, and achieve the effect of simple and fast synthesis method and cheap and easy-to-obtain raw materials

Inactive Publication Date: 2020-08-28
山东丰益泰和科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the commonly used scale inhibitors are polymer scale inhibitors, which can be roughly divided into four types: polysulfonic acid scale inhibitors, polyphosphoric acid scale inhibitors, green and environment-friendly polymer scale inhibitors and polycarboxylic acid scale inhibitors. Sulfonic acid scale inhibitors are gradually being abandoned by people due to their poor degradability. Although phosphorus scale inhibitors have excellent scale inhibition performance, their use is strictly restricted as the country pays more and more attention to environmental protection. Although the green environment-friendly antiscalant meets the requirements of the present era, polyepoxysuccinic acid (PESA) and polyaspartic acid (PASP) and their derivatives, which are the most widely studied and used in green environment-friendly antiscalants, However, its price is expensive, so its application range is narrow. Polycarboxylate scale inhibitors are mainly aimed at calcium scale, and their scale inhibition performance is single.

Method used

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  • Fluorescent carbon quantum dots with scale inhibition performance as well as preparation method and application thereof
  • Fluorescent carbon quantum dots with scale inhibition performance as well as preparation method and application thereof
  • Fluorescent carbon quantum dots with scale inhibition performance as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] A method for preparing fluorescent carbon quantum dots with scale inhibition performance includes the following steps:

[0035] Weigh 2.50g polyacrylic acid (PAA) (50%, Tech), dissolve it in 46.25g deionized water, add 1.25g ethylenediamine; mix the raw materials uniformly, and move to a closed polytetrafluoroethylene high-pressure reactor, Place in an oven, set the temperature to 180°C, react for 5 hours, after the reaction is completed, cool to room temperature naturally to obtain a brown reaction liquid; filter the reaction liquid, and the obtained filtrate is a fluorescent carbon quantum dot solution with scale inhibition performance.

[0036] The carbon quantum dot solution prepared in this example was diluted to a carbon quantum dot concentration of 300 mg / L, and the diluted carbon quantum dot solution was detected by an ultraviolet-visible spectrophotometer. The result is as follows figure 1 Shown from figure 1 The maximum excitation wavelength is 325nm, the diluted ca...

Embodiment 2

[0038] A method for preparing fluorescent carbon quantum dots with scale inhibition performance includes the following steps:

[0039] Weigh 10.0 g polyacrylic acid (PAA) (50%, Tech), dissolve it in 35.0 g deionized water, add 2.5 g diethylene triamine and 2.5 g triethylene tetramine; mix the raw materials uniformly, and move to a closed polymerization Place the tetrafluoroethylene autoclave in an oven, set the temperature to 160℃, and react for 24 hours. After the reaction is completed, cool to room temperature naturally to obtain a brown reaction liquid; filter the reaction liquid to obtain a fluorescent carbon with scale inhibition performance Quantum dot solution.

Embodiment 3

[0041] A method for preparing fluorescent carbon quantum dots with scale inhibition performance includes the following steps:

[0042] Weigh 1.67g polyacrylic acid (PAA) (50%, Tech), dissolve it in 47.5g deionized water, add 1.67g diethylenetriamine; mix the raw materials uniformly, and move to a closed polytetrafluoroethylene high-pressure reactor , Placed in an oven, set the temperature to 200 DEG C, react for 9 hours, after the reaction is completed, naturally cool to room temperature to obtain a brown reaction liquid; filter the reaction liquid to obtain a fluorescent carbon quantum dot solution with scale inhibition performance.

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Abstract

The invention provides fluorescent carbon quantum dots with scale inhibition performance as well as a preparation method and application of the fluorescent carbon quantum dots. The preparation methodof the carbon quantum dots comprises the following steps: dissolving polyacrylic acid (PAA) in deionized water, adding polyamine, and uniformly mixing; and then carrying out a closed hydrothermal reaction, cooling the reaction liquid to room temperature after the reaction is finished, and filtering to obtain filtrate that is a solution of the fluorescent carbon quantum dots with the scale inhibition performance. The obtained fluorescent carbon quantum dots have high scale inhibition performance, have good scale inhibition performance on calcium phosphate, calcium sulfate and calcium carbonate,and provide a brand-new idea for preparing the green and environment-friendly scale inhibition type fluorescent carbon quantum dots.

Description

Technical field [0001] The invention relates to a fluorescent carbon quantum dot with scale inhibition performance and a preparation method and application thereof, and belongs to the technical field of industrial water treatment chemicals. Background technique [0002] During the operation of the industrial circulating cooling water system, due to the continuous evaporation of water, the salt content in the water is continuously concentrated and increased, which exceeds the solubility of some insoluble salts and precipitates. Common precipitations include calcium phosphate, calcium carbonate, calcium sulfate, etc., especially When the water flow rate is low or the heat transfer surface is rough, these precipitates will be deposited on the heat transfer surface to form the so-called scale; coupled with damage factors such as soil and dust, industrial circulating cooling water is very easy to scale, not only Reducing the efficiency of heat transfer will also cause corrosion under ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/15C09K11/65C02F5/08C09K8/528C02F101/10
CPCC02F5/08C02F2101/10C02F2101/101C02F2101/105C02F2303/08C09K8/528C09K11/65C01B32/15
Inventor 刘晓伟程终发李小明高灿柱
Owner 山东丰益泰和科技有限公司
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